feat(landing): 230px fullbody roster, features goat column, trimmed header

- Members roster avatars render 230px tall (full body); NMSR size bumped to 256
  and tiles widened to fit the portrait.
- Features section is now two columns: the 4 feature cards stacked on the left, a
  Minecraft goat image on the right (public/Goat_JE1_BE1.webp). Stacks on narrow
  screens.
- Header nav links trimmed to How to Join + Status; the auth CTA cluster is now
  Register / Account / Play (the old "Log in" button relabeled Account →
  Cuenta/Kontua).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

landing/src/styles/main.css

@@ -474,7 +474,7 @@ section { position: relative; z-index: 1; }
    ============================================================ */
 .roster {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
+  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
   gap: 12px;
 }
 .roster-tile {
@@ -487,7 +487,7 @@ section { position: relative; z-index: 1; }
 }
 .roster-tile img {
   width: auto;
-  height: 72px;
+  height: 230px;
   object-fit: contain;
   image-rendering: pixelated;
 }
@@ -505,11 +505,31 @@ section { position: relative; z-index: 1; }
 /* ============================================================
    FEATURES
    ============================================================ */
+.feat-split {
+  display: grid;
+  grid-template-columns: 1.2fr 1fr;
+  gap: 28px;
+  align-items: center;
+}
 .feat-grid {
   display: grid;
-  grid-template-columns: repeat(2, 1fr);
+  grid-template-columns: 1fr;
   gap: 18px;
 }
+.feat-aside {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+.feat-aside img {
+  width: 100%;
+  max-width: 420px;
+  height: auto;
+  image-rendering: pixelated;
+}
+@media (max-width: 760px) {
+  .feat-split { grid-template-columns: 1fr; }
+}
 .feat {
   display: flex;
   gap: 18px;